Gert Smolka:Programming Languages and Systems, 9th European Symposium on Programming, ESOP 2000, Held as Part of the European Joint Conferences on the Theory and Practice of Software, ETAPS 2000, Berlin, Germany, March 25 - April 2, 2000, Proceedings.Lecture Notes in Computer Science 1782, Springer2000, ISBN 3-540-67262-1